Michael, Ahmad and Oscar had a total of 518 stamps at first. After a week, the number of Michael's stamps became 5 times the number of stamps he had at first. The number of Ahmad's stamps decreased by 258. Oscar had one-quarter as many stamps as he had at first. In the end, the three boys had the same number of stamps.
- How many stamps did Oscar have at first?
- What was the total number of stamps that the three boys had in the end?
|
Michael |
Ahmad |
Oscar |
Total |
Before |
1 u |
5 u + 258 |
20 u |
|
Change |
x 5 |
- 258 |
x 14 |
|
After |
5 u |
5 u |
5 u |
15 u |
(a)
Total number of stamps at first
=
1 u + 5 u + 258 + 20 u
= 26 u + 258
26 u + 258 = 51826 u = 518 - 25826 u = 260
1 u = 260 ÷ 26 = 10 Number of stamps that Oscar had at first
= 5 u ÷
14= 5 u x
41= 20 u = 20 x 10 = 200(b)Total number of stamps that the three boys had at the end = 15 u = 15 x 10 = 150 Answer(s): (a) 200; (b) 150